package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
    StringRedisTemplate stringRedisTemplate;
    @Override
    public Result sentCode(String phone, HttpSession session) {
        if( !RegexUtils.isCodeInvalid(phone))  return Result.fail("手机号格式错误!");

        String code = RandomUtil.randomNumbers(6);

        // 验证码存储在redis
        stringRedisTemplate.opsForValue().set( LOGIN_CODE_KEY + phone, code, 2, TimeUnit.MINUTES);

        log.debug("发送短信验证码成功，验证码：{}", code);

        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        // 1.校验手机号
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(phone)) {
            // 2.如果不符合，返回错误信息
            return Result.fail("手机号格式错误！");
        }
        // 3.校验验证码
        Object cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
        String code = loginForm.getCode();
        if(cacheCode == null || !cacheCode.toString().equals(code)){
            //3.不一致，报错
            return Result.fail("验证码错误");
        }
        //一致，根据手机号查询用户
        User user = query().eq("phone", phone).one();

        //5.判断用户是否存在
        if(user == null){
            //不存在，则创建
            user = new User();
            user.setPhone(phone);
            user.setNickName(USER_NICK_NAME_PREFIX+RandomUtil.randomString(10));
            save(user);
        }
        //7.保存用户信息到Redis中,生成token，返回给前端
        UserDTO userDTO = new UserDTO();
        BeanUtil.copyProperties(user, userDTO);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO, new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName, fieldValue) -> fieldValue.toString()));
        String token = UUID.randomUUID().toString(true);
        String tokenKey = LOGIN_USER_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey,userMap);
        stringRedisTemplate.expire(tokenKey, LOGIN_USER_TTL, TimeUnit.MINUTES);
        return Result.ok(token);
    }

    @Override
    public Result sign() {
        Long userId = UserHolder.getUser().getId();

        LocalDateTime now = LocalDateTime.now();

        String keySuffix = now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key = USER_SIGN_KEY + userId + keySuffix;

        int dayOfMonth = now.getDayOfMonth();

        stringRedisTemplate.opsForValue().setBit(key, dayOfMonth - 1, true);

        return Result.ok();
    }

}
